Method and device for removing iron in iron-containing solution in hydrometallurgy

Abstract

The present disclosure discloses a method and device for removing iron in an iron-containing solution in hydrometallurgy. This method comprises the steps of: adding an iron-containing solution in hydrometallurgy into a reactor through a first homogenizing distributor, controlling concentration of the ferric iron in the reactor below 1 g/L, controlling pH of the solution in the reactor to be 2.5˜4, the temperature to be 65˜100° C., and the reaction duration to be 1˜3 hours, performing solid-liquid separation for the solution after reaction, and removing the iron in the iron-containing solution in hydrometallurgy in the form of goethite.

What is claimed is: 
     
       1. A method for removing iron in an iron-containing solution in hydrometallurgy, comprising steps of: adding the iron-containing solution in hydrometallurgy into a reactor through a first homogenizing distributor, controlling concentration of ferric iron in the reactor below 1 g/L, controlling pH of the solution in the reactor to be 2.5˜4, temperature to be 65˜100° C., and reaction duration to be 1˜3 hours, performing solid-liquid separation for the solution after reaction, and removing iron in the iron-containing solution in hydrometallurgy in a form of goethite; wherein controlling pH of the solution in the reactor to be 2.5 to 4 is achieved by adding neutralizer to the reactor through a second homogenizing distributor; wherein the first homogenizing distributor is a uniform dispersing device; wherein when the iron-containing solution in hydrometallurgy contains ferrous iron, oxidant is added to the reactor to oxidize ferrous iron to ferric iron; when the iron-containing solution in hydrometallurgy does not contain ferrous iron, it is unnecessary to add oxidant to the reactor; the reactor is a reactor with stirring function. 
     
     
       2. The method according to  claim 1 , wherein the neutralizer is one or more selected from a group consisting of limestone, lime, magnesium oxide, zinc oxide and sodium hydroxide. 
     
     
       3. The method according to  claim 1 , wherein the oxidant is air or oxygen. 
     
     
       4. The method according to  claim 1 , wherein a plurality of reactors are provided, and automatic-flow connection exists between the plurality of reactors.